634940000 has 120 divisors (see below), whose sum is σ = 1594177200. Its totient is φ = 248768000.

The previous prime is 634939997. The next prime is 634940003. The reversal of 634940000 is 49436.

It is an interprime number because it is at equal distance from previous prime (634939997) and next prime (634940003).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634940003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1059701 + ... + 1060299.

It is an arithmetic number, because the mean of its divisors is an integer number (13284810).

Almost surely, 2^634940000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 634940000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (797088600).

634940000 is an abundant number, since it is smaller than the sum of its proper divisors (959237200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

634940000 is an equidigital number, since it uses as much as digits as its factorization.

634940000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682 (or 659 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 634940000 is about 25198.0157948994. The cubic root of 634940000 is about 859.4967309653.

Adding to 634940000 its reverse (49436), we get a palindrome (634989436).

The spelling of 634940000 in words is "six hundred thirty-four million, nine hundred forty thousand".